body, html
  line-height: 1
  font-weight: 200
  font-family: 'PingFang SC', 'STHeitiSC-Light', 'Helvetica-Light', arial, sans-serif
  height: 100%
  overflow: hidden

.clearfix
    display inline-block
    &::before
    &::after
        content: ""
        display: block
        height: 0
        line-height: 0
        clear: both
        visibility: hidden

@media (-webkit-min-device-pixel-ratio:1.5),(min-device-pixel-ratio:1.5)
    .border-1px
        &::after
            -webkit-transform: scaleY(0.7)
            transform: scaleY(0.7)
@media (-webkit-min-device-pixel-ratio:2),(min-device-pixel-ratio:2)
    .border-1px
        &::after
            -webkit-transform: scaleY(0.5)
            transform: scaleY(0.5)